diff --git a/library/think/Model.php b/library/think/Model.php
index 42ec0ad5..f28e5031 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -930,7 +930,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
 
             // 获取有更新的数据
             $data = array_udiff_assoc($this->data, $this->origin, function ($a, $b) {
-                return $a === $b ? 0 : 1;
+                return is_object($a) || $a != $b ? 1 : 0;
             });
 
             if (!empty($this->readonly)) {